Brake.



No. 726,862. PATENTED MAY 5, 1903.

U. DE GIVRY.

BRAKE.

APPLICATION FILED JULY 30. 1902.

NO MODEL.

ash lam): v dwvadfw W Z we, Eu @w/p UNITED STATES Patented May 5, 1903.

ULBIC DE OIVRY, OF PARIS, FRANCE.

BRAKE.

SPECIFICATION formingpart of Letters Patent No. 726,862,dated May 5, 1 903.

Application filed July 30, 1902 Serial No. 117,724. iNo model.)

To all whom it may concern:

Be it known that I, ULRIO DE OIVRY, a citizen of the French Republic, and a resident of Paris, France, have invented certain new and useful Improvements in Brakes, of which the following is a specification.

Up to the present braking action has been produced by consuming by means of friction the momentum of the vehicle which it was desired to arrest. This friction was produced in the case of blocks or shoe-brakes by forcing the blocks against the rim of the wheel and in the case of band-brakes by tightening the brake band or strap. According as the speed of vehicles and particularly of motorvehicles increased, the want was felt of a braking means which should be more eifective than the ordinary brakes. In the brake which forms the subject of the present invention this effective action is produced by arranging the brake-block in the form of a.

shoe or skid which takes under the wheel when the brake is applied. Bythis means the wheel comes out of contact with the ground and can at most revolve on the brake-shoe when the latteris appliedforinstance, when the wheel is driven by a motor. The wheel when braked in this manner can no longer cause the vehicle to move forward and the vehicle is only ableto slide forward by reason of its momentum with the brake-shoe along theground, and it will come to a standstill in a very short time. The action of the brake is therefore extremely effective.

The accompanying drawing shows by Way of example my brake applied to a motor-car.

pushed in the direction of the arrow, the connecting-rod b will act upon the lever A and will compel it to rock about the axle g. The brake-shoe 7' then moves under the felly of leave the brake-shoe,which can then be moved up again by throwing back the operatinglever. At the rear of the wheel is arranged a device Z in the form of a lock-shoe, said device being mounted on the end of the lever B, which is pivoted on the common axle g. This lever is now raised for travel in the ordinary way into the position shown in the drawing by means of a small cord h, which passes around the small pulleys 0 and p, and the free end of which is hooked in any suitable manner within reach of the driver. The object of this arrangement is to enable the driver to stop the vehicle from making any sudden movement backward, which might be caused by the breakage of the chain or by any other accident. For this purpose the le ver B is disengaged by its own weight. For this disengagement it' is sufficent to release the small cord which holds the lever in the raised position.

The above described brake is specially suited for motor-cars; but it may also be applied to railway-vehicles, tram-cars, &c.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, isa In a device of the class described the combination with a curved lever A pivotally supported and having a downwardly-curved rear end portion of a skid brake-shoe secured to the forward end of the lever, a stay-rod secured at one end to the rear end portion of the lever A and at the other to the skid brakeshoe, a hand-lever in actuating connection with the lever A, a second pivoted lever B, a skid brake-shoe oppositely faced to the like shoe carried by the lever A, and means for detachably securing the lever B in a raised position, substantially as shown and described.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

ULRIO DE CIVRY. Witnesses:

ADOLPH STURM, EDWARD P; MAOLEAN. 

